Add HGPlaceholders (#1006)
Add HGPlaceholders (#1006)

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vadymmarkov/awesome-swift,fnoah/awesome-swift,marmelroy/awesome-swift,neoneye/awesome-swift,marmelroy/awesome-swift,zenangst/awesome-swift,neoneye/awesome-swift,marmelroy/awesome-swift,neoneye/awesome-swift,vadymmarkov/awesome-swift,zenangst/awesome-swift,fnoah/awesome-swift,kingiol/awesome-swift,zenangst/awesome-swift,fnoah/awesome-swift,vadymmarkov/awesome-swift,marmelroy/awesome-swift,kingiol/awesome-swift,vadymmarkov/awesome-swift,kingiol/awesome-swift,neoneye/awesome-swift,fnoah/awesome-swift,kingiol/awesome-swift,matteocrippa/awesome-swift,zenangst/awesome-swift